@Misc{BVMC:273991, author = {Església Catòlica Papa (1621-1623: Gregori XV)}, title = {[Carta del Papa Gregorio XV al Rey Felipe, 4-06-1622].}, url = {https://www.cervantesvirtual.com/obra/carta-del-papa-gregorio-xv-al-rey-felipe-4-06-1622} }